what would you charge

Do you get to keep the money for recycling the metal? That would factor into the fees. Type of metal depends as well. Is it shred, prepared #1steel, aluminum, mixed?

go to walmart and get a receipt book, that way you keep the yard receipt and he get a copy from you. and he can't come back 2 days later thinking you ripped him off.

do it up make it look professional and your going to make money for just driving around lol